Find the Sum or Difference $\left( 4 - 3 x ^ { 2 } + 2 x ^ { 4 } + 8 x ^ { 3 } \right) + \left( - 2 x ^ { 3 } - 6 x ^ { 2 } - 9 + 3 x ^ { 4 } \right)$

Find the sum or difference.
- $\left( 4 - 3 x ^ { 2 } + 2 x ^ { 4 } + 8 x ^ { 3 } \right) + \left( - 2 x ^ { 3 } - 6 x ^ { 2 } - 9 + 3 x ^ { 4 } \right)$

A) $5 x ^ { 4 } + 6 x ^ { 3 } - 9 x ^ { 2 } - 5$
B) $2 x ^ { 4 } + 2 x ^ { 3 } - 7 x ^ { 2 } + 11$
C) $2 x ^ { 18 } - 5$
D) $5 x ^ { 8 } + 6 x ^ { 6 } - 9 x ^ { 4 } - 5$

Correct Answer:

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